Cognomen Булавас (Булавас 
) , globally, is an extremely rare family name. The cognomen Булавас is characteristic of Eastern Europe, particularly Russia, where it is an extremely rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Булавас | Ukraine, Russia |
| булавас, юозас Lithuanian legal historian, jurist and politician, LT (b. 1909) |
|